Ticket #16472: 16472.patch

wp-includes/query.php

@@ -1837 +1837 @@
          * @return mixed
          */
         function get($query_var) {
-                if ( isset($this->query_vars[$query_var]) )
+                if ( array_key_exists($query_var, $this->query_vars) )
                         return $this->query_vars[$query_var];
 
                 return '';